I just loaded 1.0.0 on a new box and am getting the following errors periodically. Apr 19 16:36:00 imap01 dovecot: auth(default): *** glibc detected *** free(): invalid pointer: 0xb7f45d14 *** Apr 19 16:36:00 imap01 dovecot: child 1943 (auth) killed with signal 6 Apr 19 16:36:00 imap01 dovecot: auth(default): *** glibc detected *** malloc(): memory corruption: 0x080920a0 *** Apr 19 16:37:31 imap01 dovecot: auth(default): *** glibc detected *** malloc(): memory corruption: 0x08091449 *** Apr 19 16:37:31 imap01 dovecot: auth(default): pam(user,ip): Child process died Apr 19 16:37:31 imap01 dovecot: auth(default): PAM: Child 13425 died with signal 6 Apr 19 16:38:09 imap01 dovecot: IMAP(user): UID larger than next_uid in file /mail_home1/c/ch/user/Maildir/dovecot-uidlist (1 >= 1) Apr 19 16:38:46 imap01 dovecot: auth(default): *** glibc detected *** free(): invalid pointer: 0xb7ea7d14 *** Apr 19 16:38:46 imap01 dovecot: child 12280 (auth) killed with signal 6 Apr 19 16:38:46 imap01 dovecot: auth(default): *** glibc detected *** malloc(): memory corruption: 0x0809143f *** Has anyone else seen something similar? What additional information can I provide? Dovecot Version=1.0.0 OS: Debian Etch CPU: x86 Maildirs are stored in NFS and only accessed via Horde/IMP webmail client. I have three other Dovecot boxes(1.0.rc28) running Sarge and haven't seen this error before. dovecot -n follows Thanks for any help. Paul imap01:/usr/local/src/dovecot-1.0.0# dovecot -n # /usr/local/etc/dovecot.conf protocols: imap listen: *:143 ssl_disable: yes disable_plaintext_auth: no login_dir: /usr/local/var/run/dovecot/login login_executable: /usr/local/libexec/dovecot/imap-login login_process_per_connection: no default_mail_env: maildir:~/Maildir mail_location: maildir:~/Maildir mmap_disable: yes lock_method: dotlock maildir_copy_with_hardlinks: yes mail_plugins: quota imap_quota namespace: type: private separator: . prefix: INBOX. inbox: yes auth default: passdb: driver: pam userdb: driver: passwd plugin: quota: maildir